Baffle for centrifugal oil separators



0 body portion Ptent Jan. i 3', 11%25.

was

ROBERT JENETT PABODIE, 0F

RUSSELL COMPANY, OF NEW YORK, N. Y.,

A. CORPORATION OF DELAWARE.

RAFFLE FOR CENTRIFUGAL O'IL SEPARATORS.

Application filed February 18, 1920. Serial No. 369,572.

To alZ whom it may comer "n:

Be it known that 1, ROBERT J. PABoDIE, a citizen of the United States,residing at Maywood, in the county of Cook, State of Illinois, haveinvented certain new and useful Improvements in Bafies for CentrifugalOil Separators; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to separators for separating oil or other liquidfrom a current of steam or other gas flowing through a conduit, and hasfor its object to provide a separator of the centrifugal type in which athorough and efiective separation of the liquid from the gas is attainedwithout any appreciable retardation of the velocity of the gas currentand with a negligible pressure diflerence in the line pressure on eachside of the separator.

A further object of the invention is-to provide an apparatus of thischaracter which contains no moving parts, is of simple design, and maybe readily installed in any gas or vapor line without attachments otherthan the ordinary pipe connections.

A further object of the invention is to provide an apparatus of thischaracter in which there are no screens or bafies inter= posed in thepath of the gas or vapor cur= rent to retard its flow and to becomeclogged and necessitate cleaning or repairs In the accompanying drawings1 have illustrated a preferred embodiment of my improved separator, andin said drawings,

Figure 1 is a verticai section through a separator embodying myinvention.

Figure 2 is a horizontal sectional view taken thru the upper portion ofthe apparatus.

Figure 3 is a view similar to Figure 1 but taken at right angles toFigure 1.

Referring to the drawings, particularly to Fig 1, 1. indicates theentrance port of the separator, The port 1 communicates with an annularpassage 3 formed in the 2 or the separator, which pas-= sage surrounds acentral vertical passage i communicating at its top with the dischargeopening 5 for the gas or vapor. The annular passage 3 is separated fromthe central passage by an unbroken wall or par tition 6 whose lower edgeterminates some distance below the line ports 1 and 5, and

at a point within the upper end of an enenlarged chamber 7 provided atthe bottom of the body portion 2.

Attached to the lower end of the web or partition 6 is a cup 9 whichdepends from the member 6 and serves to permit entrance of the purifiedvapors into the member 6 while at the same time constituting a guard atthe open end of the member 6 to exclude from the member liquid particleswhich have already been separated out and are swirling about in thespace or chamber 7 The gas or vapor entering'the port 1 is caused tospiral about in the annular passage 3 before entering the cup, by meansof. a spiral web 1;) between the partition 6 and the outer wall of theseparator, the web 13 being downwardly inclined and serving to directthe incoming gas or vapor around the partition wall 6 and in adownwardly direction. The bottom of the cup is provided with a hole 14to permit drainage from the cup of liquid which may condense oraccumulate in the cup. The bottom of the enlargement 7 will also beprovided with a discharge opening 16, the opening being provided to drawoii the oil or other material accumulated in the bottom of the;separator. The operation of this form of separator will now bedescribed. The incoming gas or vapor passes into the annular anddownwardly inclined passage 3, which not only imparts to the current arotary or circular motion whereby a centrifugal force will be impressedon the particles of oil or other liquid entrained in the current, butalso a downward direction which is so determined that the heavyparticles of oil or other liquid in the current will, through theirmomentum, pass over the lip of the cup a into the space between the cupand the outer wall of the apparatus, while the gas or vapor, due to thesuction through the discharge port of the separator, will be drawn intothe opening at the top of the cup, thence passing up through thevertical passage 4 and out at the discharge port 5.

It will be noted that at all points in the air path through theseparator, the passageways are of full cross section and not restrictedso as to retard the flow of the gas, The passage of the gas through thelit) , entrained moisture will be discharged over v as shown in the lipof the cup or even with a loW velocity fluid the separation issubstantially complete, tor such small amount of liquid as may enter thecup will be discharged against the inner edge of the cup wall instead ofmaking the turn in the central passage with the vapor current, and theliquid will drain down the wall of the cup and fall through the opening14 at the bottom into the collecting chamber.

The separator of this application is particularly adapted for separatingoil and moisture from compressed air in air-brake apparatus and otherair or gas lines having similar operating conditions. The apparatus hereshown is formed of a single inair line with tegral casting arranged inthe opening 1 is 011'- its axis verticaL- The inlet set from the centerline of the cylinder in the manner shown in Fig. 2 to such an extentthat the outer wall 15 of the opening is substantially tangential withthe inner wall of the cylinder. The baflie 13 consists of a spiral vaneformed on the inner Wall of the casting 2, the vane beginning on theside Wall ad acent the inlet opening 1 and about half way between thetransverse middle line of the opening and its lower edge, as shown inFigs. 1 and 2. The vane 13 is of a length to make about two completeturns around the inner wall of the cylinder and is preferably of a depthsuch the drawing, its inner edge forming a circular bore concentric withthe walls of the casting 2 and projecting into this bore through a holein the top wall of the casting is the center tube or partition 4 ofsheet metal, the tube having a tight fit in the vane whereby the vaneand the wall of the tube form a closed spiral conduit leading into thelower portion of the chamher and constituting the sole outlet for. thegas or air entering the apparatus, while the bore/of the tube forms avertical passage connecting the lower portion of the chamher with theoutlet 5.

The lower end of the tube 6 is closed by the semi-spherical cap 9 which,for convenience of assembling, has its outer diameter mpial to the innerdiameter of the tube, w iereby the cap may be attached to the tube 6 bymeans of tongues 11 projecting upwardly from the edge of the cap intothe bore of the tube and Welded orotherwise attached thereto, the edgeof the cap being spaced from the end of-the tube a sufiicient distanceto provide free passage of the air from the chamber 7 into the bore ofthe tube.

The above described apparatus has cer tain well defined features ofadvantage for particular conditionsof use. By having the inlet openingtangential to the wall of the cylinder the moisture is deflected awayfrom the wall of the cylinder with less change in direction thanrequired in other tubes of separators. Also, the spiral path separatingthe two parts of the chamber allows ample time in which the liquid maycollect at the outside wall and the inlet opening at the center.

The apparatus is of low manufacturing cost and is especially eflectiveinsmall sizes as it requires but a small diameter of cylinder to impartthe necessary centrifugal force to the entrained moisture to separate itfrom the gas current.

I claim:

1. A centrifugal separator of the class described comprising a bodyportion, inlet means for the fluid to be acted upon, a chamber withinsaid body portion in which the separation of thelighter and heavierportions of the fluid is effected, a battle for directing the flow ofthe incoming fluid formed integrally wit-h said body portion andprojecting inwardly into said chamber, a delivery passage for thelighter portions of the separated fluid comprising a hollow memberseparate from said body portion and extending into said'chamber, theinner edges of said bafile constituting an opening of substantially thesame conformity and dimensions as theouter surface of said hollowmember, whereby said member fits snugly within said opening, meansadjacent; the inner end of said member of maximum dimension notexceeding the maximum trans verse dimension of said member, said meanspermitting entrance of purified fluid into said member adjacent thelower edges thereof and at the same time serving as a guard for the openend of said member, and separate outlet means for discharging theheavier portionsfof the separated fluid. 2. A centrifugal separator ofthe class described, comprising a, means for the incoming fluid, achamber within said body portion in which the separation of the lighterand heavier portions of the fluid is effected, a baiilefor directingaway from the flow of the incoming fluid formed in.

tegrally with said body portion and project ing inwardly into saidchamber, said baflle constituting a plurality of convolutions along theinner wall of said chamber, a delivery passage for the lighter portionsof the separated fluid comprising a hollow member separate from saidbody portion and extending into said chamber, the inner bore of saidbattle constituting an opening of substantially the same conformity anddimensions as the outer surface of said hollow member whereby asubstantially closed circuitous path is formed for receiving andconveying body portion, inlet memos the incoming fluid, means foradmitting the purified fluid to said delivery passage comprising a,guard member positioned at the inner end of said hollow member and ofmaximum dimension not exceeding the maximum transverse dimension of saidmember whereby said hollow member may be inserted into position withinthe chamber to constitute the completely assembled apparatus, an openingbeing provided between 1 said guard and said hollow member, and separateoutlet means for discharging the heavier portions of said separatedfluid.

In testimony whereof I afiix my signature.

ROBERT JENETT PABUDIE.

